Exam MB-400 topic 3 question 1 discussion

init is used to initialize the component instance. Components can kick off remote server calls and other initialization actions. Data-set values cannot be initialized here, use the updateView method to achieve that. Therefore, you cannot use init.

I will wote for C: init The reason: Component should allow you to select country code and then format phone number accordingly. Looks like your component will contain two pieces: - dropdown with country codes - textbox (input) to enter phone number Inside init you do construct the html for those 2 pieces and there you can call webAPI.RetrieveMultiple to obtain all country codes from "CountryCode" custom entity and add them as options to dropdown. This will solve the requirements "You need to get the list of valid area codes when a contact record is opened and BEFORE the user enters a new phone number"

It is INIT couse: You need to get the list of valid area codes when a contact record is opened and before the user enters a new phone number. So we have to retrieve it before any change run updateView

Correct A

I say Init. Data-set provides properties and methods to work with data on grids and views. WIth a single field, this is not the case. Notice that updateView is not called for field null values: Always use a required field that is guaranteed to have a value. If your field does not have a value, your embedded canvas app will not refresh in response to any change in data on the host model-driven form.